| 简介 |
The invention relates to a structure of the honeycomb type, comprising a porous ceramic material based on aluminum titanate, the thermal expansion coefficient of which between 20 and 1000° C. is less than 2.5×10−6/° C., said structure also having a porosity greater than 10% and a pore size centered between 5 and 60 microns, said structure being characterized in that the composition of the porous ceramic material comprises, by weight, from 30 to 60% of Al2O3, from 30 to 60% of TiO2, from 1 to 20% of SiO2, less than 10% of MgO, less than 0.5% of oxides from the group Na2O, K2O, SrO, CaO, Fe2O3, BaO and rare earth oxides, said structure also being characterized in that it has a permanent linear change on reheating, after heating at 1500° C., of less than ±0.3%. The invention also relates to a catalytic filter or support obtained from such a structure. |
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